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Articles About polymer

This paper presents an original method to compute the loaded mechanical behavior of polymer gears. Polymer
gears can be used without lubricant, have quieter mesh, are more resistant to corrosion, and are lighter in weight.
Therefore their application fields are continually increasing. Nevertheless, the mechanical behavior of polymer materials is very complex because it depends on time, history of displacement and temperature. In addition, for several polymers, humidity is another factor to be taken into account. The particular case of polyamide 6.6 is studied in this paper.

In the hypercompetitive race to increase automobile efficiency,
Metaldyne has been developing its balance shaft module line with Victrex
PEEK polymer in place of metal gears.
The collaborative product development
resulted in significant reductions in
inertia, weight and power consumption,
as well as improvement in noise, vibration and harshness (NVH) performance.

This paper presents an original method for computing the loaded mechanical behavior of fiber reinforced polymer gears. Although thermoplastic gears are unsuitable for application transmitting
high torque, adding fibers can significantly increase their performance. The particular case of
polyamide 6 + 30% glass fibers is studied in this paper.

Hoechst Technical Polymers has expanded its interests in plastic gears with the introduction of the new Plastic Gear Evaluation and Research machine P-Gear. The machine is the centerpiece of the company's continuing efforts to promote and develop the use of plastic gears in higher-powered applications.

Advancements in machining and assembly techniques of thermoplastic gearing along with new design data has lead to increased useage of polymeric materials. information on state of the art methods in fabrication of plastic gearing is presented and the importance
of a proper backlash allowance at installation is discussed. Under controlled conditions, cast nylon gears show 8-14 dBA. lower noise level than three other gear materials tested.